100 Year History: Precipitation

Basic monthly data are from the Notch Reservoir station (north slope of Mt. Greylock in North Adams) between 1899 and 1986 and from Hopkins Memorial Forest (Station 1) in Williamstown from 1986 until present. For the period 1901-1941, when precipitation was measured in Williamstown (at Williams College) and at the Notch Reservoir (Milham, W. I., 1950, Meteorology and meteorological observations in Williams College, also at Hopkins Memorial Experimental Forest and in North Adams: McClelland Press, Williamstown, 40 p.), annual totals from the two sites differed by less than 8%, on average. The "annual" column is compiled from Milham's Williamstown and Notch records (1892-1940), from unpublished Notch records (1940-1985) and from Hopkins Forest (1986-present). Milham also reports data from 1816-1891 for Williamstown, but records are less complete and are not included here.